ceftests: Format with clang-tidy (see #3632)

tests/ceftests/track_callback.h

@@ -8,14 +8,16 @@
 
 class TrackCallback {
  public:
-  TrackCallback() : gotit_(false) {}
+  TrackCallback() = default;
   void yes() { gotit_ = true; }
   bool isSet() { return gotit_; }
   void reset() { gotit_ = false; }
+
+  // Code relies on this not being marked explicit. NOLINTNEXTLINE
   operator bool() const { return gotit_; }
 
  protected:
-  bool gotit_;
+  bool gotit_ = false;
 };
 
 #endif  // CEF_TESTS_CEFTESTS_TRACK_CALLBACK_H_